Vitamin C-1000 by NOW Foods

The verdict. Cheap, safe, and almost certainly not doing what you think. The headline finding from decades of research is blunt: vitamin C does not prevent colds in the general population. That's been tested extensively and the answer keeps coming back the same. What it does do is more modest, and worth knowing before you spend eighteen dollars.

Who this is for

• You smoke, or you eat very few fruits and vegetables — the two groups most likely to be genuinely low.
• You're doing heavy physical work or extreme exercise, where the evidence is actually stronger.
• You want the cheapest reliable form and don't want to pay for liposomal marketing.

Who should skip it

If you eat fruit and vegetables regularly, you're almost certainly getting enough — an orange and a red pepper roughly covers it. If you have a history of kidney stones, be careful: high-dose vitamin C increases oxalate and is a genuine risk factor. And if you're buying it to avoid catching colds, the research says save your money.

What's actually in it

1000 mg of ascorbic acid per tablet — well above the ~75–90 mg daily requirement. Above roughly 200 mg, absorption drops sharply and the excess is excreted. In practical terms you are paying for expensive urine past a certain point. Note also that 250 tablets is eight months of supply, which makes the per-tablet cost genuinely low.

What the research actually looks at

Honestly summarised: routine supplementation does not reduce how often you catch colds. It does appear to shorten duration slightly — on the order of 8% in adults, so roughly a day off a fortnight of illness. The clear exception is people under extreme physical stress — marathon runners, soldiers, skiers in the cold — where trials show a substantially larger reduction in incidence. That's a real finding and it's specific.

Vitamin C is genuinely essential — it's required for collagen synthesis, iron absorption, and immune function. Deficiency is serious. But essential and beneficial in surplus are different claims, and the supplement aisle blurs them.

How we'd use it

If you're taking it, split the dose rather than taking 1000 mg at once — absorption is better in smaller amounts. Take it with an iron-containing meal if iron is a concern; vitamin C meaningfully improves non-heme iron absorption, which is one of its more useful and least discussed properties.

The honest trade-offs

• It won't stop you catching colds. The evidence on that is clear and consistent.
• High doses cause digestive upset in a lot of people.
• Kidney stone risk is real at high doses for susceptible people.
• Food beats tablets here more than in almost any other category.

Bottom line

A well-made, very cheap version of a vitamin most people don't need to supplement. Genuinely useful if you smoke, eat badly, train extremely hard, or want help absorbing iron. Not the cold-prevention product it's sold as.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Nothing here is medical advice — talk to a qualified professional about your own situation, particularly if you have a history of kidney stones.